CSP流程薄板坯及热轧板卷氧化皮组织演变

黎先浩 康永林 吴光亮 李会

钢铁研究学报 ›› 2009, Vol. 21 ›› Issue (12) : 20-20.

钢铁研究学报 ›› 2009, Vol. 21 ›› Issue (12) : 20-20.
冶炼与加工

CSP流程薄板坯及热轧板卷氧化皮组织演变

  • 黎先浩 康永林 吴光亮 李会
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Oxide Scale Microstructure Evolution of Thin Slab and Hot-strip Rolled by CSP

  • LI Xian-hao Yong-lin KANG Guang-liang WU Hui Li
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摘要

采用SEM和XRD方法对CSP冷轧冲压用钢薄板坯和热轧板氧化皮进行了研究。结果表明:覆盖在板坯表面的氧化皮对氧化性炉气的高温腐蚀有明显保护作用,均热前后Fe2O3:Fe3O4:FeO为5:35:60,新鲜基体腐蚀严重些,Fe2O3和Fe3O4含量增加到28%和64%;卷取后快冷钢的氧化皮以2层结构为主,Fe2O3:Fe3O4:FeO为6:31:63,缓冷钢的氧化皮中析出了弥散或薄片状的Fe相,Fe2O3:Fe3O4:FeO:Fe为8:73:15:4,二者厚度相差不大;卷取温度升高,快冷钢的Fe2O3和Fe3O4的含量略有降低,但缓冷钢中残余FeO含量明显减少,不利于酸洗。

Abstract

The oxide scale on both thin slab and hot rolled strip for cold rolling steel have been studied by XRD and SEM. It was shown that: Oxide scale prior to soaking can protect obviously thin slab from high temperature corrosion of oxidation gas. After soaking Fe2O3:Fe3O4:FeO is 5:35:60, content of Fe2O3 and Fe3O4 are 28% and 64%, respectively. Oxide scale of strip with quick cooling after coiling comprise mainly two layer structure and Fe2O3:Fe3O4:FeO is 6:31:63. For the strip with slow cooling, new dispersed or lamellate Fe phase precipitates and Fe2O3:Fe3O4:FeO:Fe is 8:73:15:4. There is no distinct difference of thickness between two oxide scale. Content of Fe2O3 and Fe3O4 decrease a little for the strip with quick cooling after coiling. However, for those strip with slow cooling after coiling, content of remained FeO of oxide scale obviously decreases, which is unfavorable for pickling.

关键词

CSP / 氧化皮 / 薄板坯 / 热轧带钢 / 组织

Key words

CSP / oxide scale / thin slab / hot-rolled strip / microstructure

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导出引用
黎先浩 康永林 吴光亮 李会. CSP流程薄板坯及热轧板卷氧化皮组织演变[J]. 钢铁研究学报, 2009, 21(12): 20-20
LI Xian-hao Yong-lin KANG Guang-liang WU Hui Li. Oxide Scale Microstructure Evolution of Thin Slab and Hot-strip Rolled by CSP[J]. Journal of Iron and Steel Research, 2009, 21(12): 20-20

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